Thanks to Gilli to share the pics.
The lands that are acquired are now being fenced using this type of fence (now becoming common practice across TN). Me and our Sundar noticed this when we went to spot the AI COK flight but I was able to click this only when I went to spot the BLR flight by SG some days back (the clicking of the flight was anyways not very successful).
I inquired a man who was selling tender coconuts in Mandela nagar bus stop (nearby the ring road opposite to this very site) and he told that that area comes under Ayanpaappaakudi (village or panchayat I am not sure, you guys should find the same name in the government gazette notification of land acquisition for IXM expansion) and they fenced these lands a month back and told that those who don't have pattaa are being acquired (maybe his understanding was that), I managed to give him some explanation on Airport expansion and big aircrafts and left in 15 mins.
I was able to see similar fenced lands here and there in the ring road.
So, land acquisition is going slowly but sure. If corporation hands the land quickly to IXM expansion, I am sure we will be having a big runway soon.
And I hope you guys see some construction materials (stones and sand) nearby the runway in the first picture, I was not sure for what they were, if only somebody could shed more light on that?